We always make our machines work well.
A.Our machines are often in trouble.
B.Our machines are always in good working order.
C.We are repairing the machines now.
D.We are maintaining the machines now.
正确答案是B
We always make our machines work well.
A.Our machines are often in trouble.
B.Our machines are always in good working order.
C.We are repairing the machines now.
D.We are maintaining the machines now.
正确答案是B